Quote:
Originally Posted by cabmando
You'd have to check the supply wire size to determine if you could go up to a 20 amp. Generally you need at least 12/2 with ground for a 20 amp circuit. It sounds like the GFI is tripping with only the pump so it would seem there is an issue with the pump. It's my understanding that a GFCI doesn't protect against over current.
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This is my understanding as well (bold.)
GFCI monitor
amp differential between the HOT and NEUTRAL lines. If the amps drawn by the HOT is more than the "return" amps of the NEUTRAL, the GFCI trips because there is a "leakage" of current somewhere in the circuit.
I would first try the pump without the z wave adapter, just to eliminate some issue with that device. If the pump still trips the GCFI, replace the pump or double check the wiring connections for the pump. There seems to be an initial current leak when the pump is first started, but disappears when restarted.